50 Ft. Driveway Vehicle Sensor (FM138) for Mighty Mule Automatic Gate Opener , Black

I use this for my Mule gate opening system. It is of very good quality and very heavy. The cord is very long Id say 75 feet. It works well and connects directly to the system. The price is a little high nut there arent many other options so its hard to complain. It was easy to install.

This gate sensor works great, so much better than having to dig for the remote!!

Paired nicely with my mighty mule gate opener. First one was only 50 ft and after so many years outdoors the squirrels finally killed it.

Absolutely love this!

This was a replacement for one that I had installed in 2009. It apparently went bad due to water. I noticed the old one had a small board that hooked between the yellow wire and the black. The new one did not come with one. So I hooked it up per the diagram and it worked fine except I noticed later in the day it was opening without a car there, in fact it was opening all the time. Reading the reviews, I noticed that one customer had the mule co send him a small board that went between the yellow wire and the black. I hooked my old one back up and the gate triggers fine with a car and no false openings. I measured the variable resistor and it is a 500Kohm pot. Mine was adjusted halfway at 250K ohms. So anyone with the falsing problem could get a 500K pot and set it for their own needs, about halfway. The other thing is that these units do not appear to be 100%waterproof. For $120, I want the thing to last a long long time. So I suggest that people use some silicone RTV caulking to seal the little hole that the wire goes into. Even better is to seal the whole unit into a piece of PVC pipe. Check the photos.

Simple instructions to follow and once installation was completed the gate worked on our first try

This seemed a bit pricey to me, but it is very well built and works perfectly, so you get what you pay for. I connected it to a Gatexpert AT1350 sliding gate opener and it works perfectly. The cable is heavy duty and suitable for direct burial, but I put it in PVC conduit anyway to ensure no issues. The hook up is straight forward, just 4 wires. Trenching 12" deep is the hardest part, but that would be necessary for any quality vehicle sensor.

Heed the warning of others, this product has a tendency to fail. To install correctly this takes a good amount of work and cost, conduit. It worked great for a few months and then started to fail, and in no time it completely failed. Installed as per instructions with no alterations. I've not contacted Mighty Mule about this issue yet. I will, and will report back their response.

Bought this one before I realised there was a wireless option, so this one has to be trenched in, but easy enough if you rent a trencher. I did it by hand. Works great! The instructions say to have it a farther distance out from the gate than the amount of cable it came with, so I just went as far as the cable allows and have had no problems with it. I had to trouble shoot initially because there is an extra wire, not in my instructions, but found a different set online that accounted for it. So far has been working great, nice to just drive up and have the gates open for you.

I don't understand why this product comes with the yellow sensitivity wire but the instructions just say to wire it directly to ground which is max sensitivity. Gate will open by itself as many reviews indicate. Just need the little pot board included and the original instructions that include wiring in the pot board and the product is perfect apart from the benefit of installing in a pit which is protected from water as if its buried in the ground eventually water will penetrate the housing.

everything as promised

I can not rate it. Cause I returned it. I ordered the wrong part. I was looking for the driveway alert extender. However if it's anything like the mule driveway extender. Then it's a 5 start

Sent it back decided to use key pads on both sides so don’t have a review